Calculate the speed of sound in oxygen from the following data:
Mass of 22.4 litre of oxygen at STP = 32g, $C_V=2.5R$

The correct option is C 315 m/s
$C_P-C_V=R{C}_P=R+C_V=R+2.5R=3.5R\gamma =\frac{C_P}{C_V}=\frac{3.5R}{2.5R}=1.4$
Density of oxygen at STP$=\frac{mass}{volume}$
$=\frac{32\times {10}^{-3}kg}{22.4\times {10}^{-3}{m}^3}$
$\rho =1.4286kg{m}^{-3}$
Normal pressure or standard pressure = $1.013\times {10}^{5}Pa$
$V=\sqrt{\frac{\gamma P}{\rho }}=\sqrt{\frac{1.4\times 1.013\times {10}^5}{1.4286}}V=315m{s}^{-1}$

Ans: $315m{s}^{-1}$